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Liquid Ion-exchange Extraction of some Physiologically Active Amines


SOME long-chain alkyl phosphoric acids and long-chain alkylamines can be used as liquid ion-exchangers in a process analogous both to conventional ion-exchange with solid resins1 and liquid-liquid extraction. The liquid ion-exchanger is dissolved in a water-immiscible liquid and partitioned with an aqueous solution of the ions to be separated. Extensive use has been made of this technique in the separation and recovery of inorganic cations, particularly heavy metal ions such as uranium.

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TEMPLE, D., GILLESPIE, R. Liquid Ion-exchange Extraction of some Physiologically Active Amines. Nature 209, 714–715 (1966).

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